Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail)

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Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 41,388 $ 36,877
Less - accumulated depreciation and amortization 24,939 23,589
Property, plant and equipment, net 16,449 13,288
Land [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 210 210
Buildings and Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 13,249 13,179
Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 24,904 23,474
Construction in Progress [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 3,025 $ 14